I think it still worth it. You can't have 100% availability. Even AWS sometimes fails. It's then just a matter of changing DNS record and have your server(s) ha

I think it still worth it. You can't have 100% availability. Even AWS sometimes fails. It's then just a matter of changing DNS record and have your server(s) handle the load in some kind of degraded mode. Peripheral but somewhat relevant, at work, we don't upload photos immediately to S3. We have to pre-process them but as soon as they are ready, we show them to the customer serving then locally. And only then upload them to S3. I treat a CDN as a cache, great to have but I wouldn't exclusively rely on it. For whatever reason, you might need to degrade or show results asap, you can't do that if the CDN is the primary source.